Borrowing it
Nothing to install: this file belongs to yavorsky/unbuilt.app. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/yavorsky/unbuilt.app/main/.agents/skills/unbuilt/SKILL.mdgit clone --depth 1 https://github.com/yavorsky/unbuilt.appWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/yavorsky/unbuilt.app/unbuilt)<a href="https://agentmods.dev/skills/yavorsky/unbuilt.app/unbuilt"><img src="https://agentmods.dev/badge/skills/yavorsky/unbuilt.app/unbuilt/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/yavorsky/unbuilt.app/unbuilt"><img src="https://agentmods.dev/badge/skills/yavorsky/unbuilt.app/unbuilt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00073 | $0.00500 |
| Opus 5 | $0.00036 | $0.00250 |
| Sonnet 5 | $0.00015 | $0.00100 |
| Haiku 4.5 | $0.00007 | $0.00050 |
Grade A, and why
unbuilt scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
unbuilt
Detect the complete technology stack of any website using live code analysis.
When to use
- User asks "what tech stack does [website] use?"
- User says "build me something like [website]" — analyze it first
- User wants to compare tech stacks of different sites
- User needs to understand a competitor's technical choices
Prerequisites
Requires Node.js >= 20. Install if not present:
npm install -g @unbuilt/cli
Analyze a website
unbuilt <url> --format agent
Always use --format agent — it returns compact one-line-per-category output optimized for your context window.
Example output:
Framework: Next.js
UI: React
Bundler: Webpack
Styling: Tailwind CSS + PostCSS
State: Zustand
Tables: TanStack Table + TanStack Virtual
Components: Radix UI
Animation: Framer Motion
Router: Next.js Router
Monitoring: Sentry
Alternative output formats
Only use these if the user explicitly asks for more detail:
--json— full structured JSON with confidence scores and matched patterns- No flag — default table output with all categories
Remote analysis
If Playwright fails or takes too long:
unbuilt <url> --remote --format agent
Uses unbuilt.app servers with cached results.
Detection categories
Framework, UI Library, Bundler, Styling, Component Library (Radix, Headless UI, Ant Design), State Management, Tables/Virtualization (TanStack Table, AG Grid, Virtuoso), Forms (React Hook Form, Formik, Zod), Animation (Framer Motion, GSAP, Lottie), API Patterns (GraphQL, tRPC, WebSocket, SSE), HTTP Client, Router, Translations, Dates, Transpiler, Monitoring, Analytics, Platform.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 71 lines · 73 tokens per session scan A 887ffe29e4dd
unbuilt is a skill published in the GitHub repository yavorsky/unbuilt.app (92 stars, last pushed 19d ago), licensed MIT. It adds 73 tokens to every session and 500 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
cms-detection
Identify CMS, frameworks, and server technology stacks on live hosts.
visual-recon
Screenshot all live hosts for rapid visual triage and technology fingerprinting.
shaman-tesla
A problem-solving method for inventing, designing, testing, improving, and applying technical ideas. It uses a five-step process and a checklist for investigating difficult problems.
paper-analyzer
Deep analysis of a single paper — generate structured notes with figures, evaluation, and knowledge graph updates.
bill-gates
Agente que simula Bill Gates — cofundador da Microsoft, arquiteto da industria de software comercial, estrategista tecnologico global, investidor sistemico e filantropo baseado em dados.
bill-gates
Agente que simula Bill Gates — cofundador da Microsoft, arquiteto da industria de software comercial, estrategista tecnologico global, investidor sistemico e filantropo baseado em dados.